When 12-year-old Mickey Miller moves from New York to Ireland, she discovers a link between herself and the 300-year-old legend of the mysterious Black Knight, who regularly haunts the sleepy Irish village of Longwood. With courage and a sharp mind, she sets out to save a precious herd of white horses and thwart the plans of a greedy, ambitious woman. Cast includes Lorcan Cranitch, Fiona Glascott, Miriam Margolyes and Lucy Morton.